Just like it says, what aftermarket bov's fit on the 1g dsm flange? Its already on my charge pipe, so why not use it.

 

just get the 1g bov. they're pretty good in terms of cheap BOVs. if you're running high boost (which most of us arent) you can crush the top of it, and it will hold up to around 25psi or so.

 

I bought a blitz bov off ebay that has a 1g dsm bov flange, it was a perfect plate mounted to the bov, 3/8 thick so the hex screws flush mounted it in place so they dont interefere with the gasket surface, maybe you could make your own.